Bolt-pulling device



vices and has for proved means of Patented May UNITED STATES ,PATE

N'T OFFICE.

FRANK C. COURSON, OF ALTOONA, PENNSYLVANIA.

BOLT-PULLING DEVICE.

Application filed September 23, L922.

To all whom it may concern:

Be it known that FRANK 0.

Common, a

citizen of the United States, residing at Altoona, in the county of Blair and State of Pennsylvania,

has invented certain new and useful Improvements in Bolt-Pulling Devices, of which cation.

This invention pulled as well as the bolt.

Another object the following is a specifirelates to bolt pulling deits primary object an imgripping the bolt to be a novel means for pulling of this invention is to provide an IIDPIOVGd type of locomotive frame bolt puller frame block the frame in which consists primarily of a that is adapted to rest against which is positioned the bolt to be pulled, while gripping blocks within the frame block are forced against the bolt head by virtue of the action of a wedge action set a plurality up through of screws that pass through the frame block, each bolt passing through the block engages a compression block which is block.

recessed within the frame A further object of this device is to provide a rugged and durable device with few parts which can be manufactured and maintained at a minimum cost.

A still further reduce the high object of this device is to cost of loco-motive repairs in locomotive shops as quite frequently it is a difficult and expensive process to remove some of the ream locomotive frame taper fitted bolts in modern construction.

l/Vith these and many other objects in view which will be more readily apparent as the nature of the invention is better understood, the same consists in the novel construction,

combination and will be hereinaf claimed. It will be qu those skilled in the art to tion belongs that the same is arrangement of parts as ter fully pointed out, and

ite readily understood by which this invenquite susceptible to various changes and modifications without departing of the invention, oughly practical from the spirit or scope but a preferred and thorembodiment of the inven- Serial No. 5

tion is shown in the in whichaccompanying drawings Figure l is across sectional view of my improved bolt puller showlng'all the various parts in operative Figure 2 1s a sid frame block shown Figure 8 is a having all removed therefrom relation. e elevational vlew of the in Figure 1.

plan view of the frame block the various operating elements Figure 4 is an end elevational view of the block shown in F i gure 3 of the drawings.

Figure 5 is a front elevational view of one of the bolt head are shown in the assembled positionin Figgripping units which ure 1 of the drawings.

Figure 6 is a sid Figure 7 is a b parts shown in Flg e elevational view of the part shown in Figure 5 of the drawings.

ottom edge view of the ure 5 of the drawings.

Figure 8 shows an elevational view of the filling liner which in Figure 1 of the Figure 9 is an liner shown in Fig Figure 10 is a is adapted to be at is shown in cross section drawlngs 1 edge view of the filling ure 8.

plan view of a collar that tached to the end of one of the bolts which are used to back the frame block away from the frame when the bolt puller is used of locomotive frames.

to pull frame bolts o-ut F i 'ure 11 is an elevational view. of the 6 parts shown 1n Figure 10 of the drawings.

Similar reference numerals refer to similar parts throughout the several figures of the drawings.

In carrying out a frame block the numeral 10 gular hole out rectangular hole the base of the the rectangular op bottom opening. I

Coacting with the desi this invention I provide 'nated in its entirety by ening is longer than the inclined surfaces, 11, is

a liner 12, the thickness of which is varied according to the diameter of the bolt head of the bolt to be is provided with a extracted. The liner 12 ledge 13, the face 14 of 10a which is adapted to engage the surface of the frame block 10 as shown in Figure 1 of the drawings.

The liner 12 is preferably finished on both sides 16 and 17 in order to provide a smooth unobstructed surface for the parts that coact in conjunction therewith. -The surface 17 is engaged by an inclined surface 18 of a bolt head gripping block designated by the numeral 19, shown in detail in Figures 5, 6 and 7 of the drawings.

The bolt head gripping block 19 is provided with a plurality of gripping faces 20 each of which grips a side of the bolt head. The gripping faces are each preferably provided with a thread or toothed like surface 21 which serves in a very practical way to prevent any slippage after the pulling effort has been applied.

The block 10 is further provided with a plurality of threaded openings 22 and 23, in each of which is adapted to fit a threaded bolt 24, the end 25 of which is adapted to rest in an annular collar 26, which is suitably secured to the end of the bolt 24; to facilitate handling.

In assembling this improved bolt puller around a bolt to be extracted the block 10 is placed over the bolt head 27 and the gripping blocks 19 are placed on each side of the head as shown in Figure 1 of the drawings; liners 12 are then inserted between the taper faces of the jaw and the tapered face of the block 10'. The thickness of the liner 12 is governed by the size of the bolt head. The faces'29 of the gripping block 19 are separated such that when the full gripping action is exerted the faces do not impinge against one another.

The screws 24 are then adjusted such that the surface rests against the surface from which the bolt is to be extracted. The bolts 2 1 are each turned down thus forcing the frame block 10 away from the frame on which the block is adapted to rest when the bolt puller is applied to the bolt. The first action when pulling a bolt is to force the surping portions and face 21 of the block 19 into the surface of the bolt head. Further removal of the block 10 from the frame serves to extract the bolt which is easily accomplished without effort or danger.

Having thus described my invention what I claim and desire to be secured by Letters Patent is- 1. A bolt pulling device .comprising a head having a central inclosed opening provided witlf downwardly and inwardly inclining end walls, and also having threaded openings terminating in enlarged socket port-ions open at the bottom face of the body, said openings being located between the said inclined walls of the central opening and the ends of the body, screws adapted to be inserted in said threaded openings having swivelled bearing feet arranged in said sockets, and bolt-head clamping portions detach-ably fitted in said central opening and cooperating with the inclined walls to grip the bolt-head upon the upward movementof the body.

2. A bolt pulling device comprising in combination a body having a central opening provided with downwardly and inwardly inclined end walls, screws having a threaded engagement with thebody and projecting through one face thereof to engage an abutment surface, removable bolthead grippingsport-ions ada 'ited to be arranged in said central opening, and liner-plates adapted to be interposed between said gripthe inclined walls of the opening. i

3. A bolt pulling device comprising in combination a body provided with a central opening having opposite converging walls,

lifting screws carried by the body, and a plurality of detachable bolt-head gripping portions and detachable liners cooperating therewith to adapt the device to engage boltheads of different sizes.

In testimony whereof ture.

he affixes his signa- FRANK CO LFRSON. 

